Demountable rim.



Jfo. COLE."

DEMOUNTABLE RIM.

APPLICATION FILED MAY 1Q, 1913.

Paterited Oct. 27, 1914. 1

2 SHEETS-SHEET 1.

INVENTOR,

5in (2Z6,

BY Arrozeiir I J. c. COLE. DEMOUNTABLE RfM. APPiIIGATION FILED MAY 10, 1912- .1, 1 14,9 5, Paizented 0013.27, 191-4.

IVITNESSES: INVENTOR,

- 7% 2 I Jam; 61 6216,

A TTORNEYJ This. invention S A E PATENT m Joiiiv oLARnNoE core, or CHICOPEE FALLS,

RUBBER (IGMIBANY; or onIcoPEE FALLS,

DELAWARE. 1

Application filed May 10, 1912. Serial No. 696,311.

To all whom it may concern able Rims, ,of -\vh1ch the following is a specification.

relates to automobile wheels and particularly to the rim construction thereof whereby a pneumatic tire can be easily manipulated in the operations of repairingor replacing tires.

he invention embodies a demountable rim made in two circinnferential parts which rim is suitably fastened to the tire to go on or oii" the telly with the tire. The rim is divided into its'two'parts circumferentially whereby the two parts can be separated as the innertube is pulled out of or placed in the shoe. A locking ring with means for engaging and mountable rim thereto is provided together with fastening evices to bind the removable rim to the telly as desired.

The object of theinvcntion isto provide an improved construction of the class referred to.

Other objects will appear in the detailed description andannexed claims;

ln thcdrawings Figure 1is a. cross sec than through the deinountable rim, locking ring, fixed rim, and telly showing the parts assembled with'thc -tire inplace. Fig. 2 is a. perspective view of a portion of the demountable rim. Fig. 3 is a. perspective view olv the locking ring showin th'elatch thereoi in closed position. F 1g. -l is a side eleva- 'tien partly in cross section of the locking ring and lemountable rim showing the po sition taken by the locking ring when the latch thereof. is inoperative.

Referring to Fig. 1 the telly It usually has a fixed rim g permanently attached thereto by anysuitable means. This rim can be of metal such as steel and serves as a true supporting surface for the locking ring. The felly itself conldserve as the true supporting surface but it is preferable to provide said fixed rim as described. The locking ring a is made self-contracting so that when the latch 18 not in closed position the diameter of the fixed rim is less than the demountahle rim. A'latch is provided in DEMOUNTABLE RIM.

Specification of Letters Paten t.

position by closing the latch.

holding the tie-- the slots m of the demountable rim.

rmssscnussrrs, ASSIGNOB. ro first; MASSACHUSETTS, A coaronarrroupr; v

lawman. 275.1914.

the locking ring (see Figs. 3 and 56 that said ring when forced outwardly to increase its diameter can be kept in its expanded, -The normal position of the locking ring with the latch; out of place is indicated in Fig. 4,-while theifso closed position of the latch and the ring. exf pand'ed is'indicated in Fig. '3. This ring is provided with aseries of projections Jail. for a purpose to be. described Thefdei mountable rim is made in. two Circumferential sections b and k each provided with slots 'm; arranged in circumferential series to coiiperatejwith projections d of the locks ing ring. One or more dowel pins 1- 'are provided to properly position the two halves 7) and k to receive the projections d ofothe locking ring. In the locking ring 0 adjacent to the latch at there are two holes 7 and '0 for the purpose of expanding said locking ring into latch closing position by-the-iuse of any suitable tool. The projections ,on the locking ring 0 are wedge shaped at their ends in order that they may easilyenter or leave the slots m in the demounta-blc rim II: and Z). f j The o]')eration of the'structure is as follows: The tire a is first placed on the demountable rim Z: and b', the heading of the tire being engaged by the hooked shaped sides of said rim and the division linebetween. the two halves of the rim being in line with the opening of the tire shoe. The demountable rim is then adjusted sozthat the slots will be in properrelation as in line with one another as shown in Fig. 2, and kept in this position by means of the dowel pin 1". The'locking ring a. is then placed inside of the demountable rim with the projections at the side opposite the latch engaging the slots m of the demountable rim in a manner indicated in Fig. 4;. It is now necessary'to close the latch t. This is done by inserting a suitable tool in holes n and '0' whereby the locking ring is spread and expanded in a manner to force the projec- Lions (Z on the latch side of the ring into The latch t is then brought upwardlv and the projections d thereon are. forced into the corresponding slots m in the demountable rim. The tire a, members I) and k, and'the locking ring 0, are now held firmly together and remain in this condition as long as the i4 ing the collapse of 7 shaped it is able the operator projections (l on the latch t engage the slots at in members b and it. Thus the assembled device may be slid as a unit onto the wheel and the'expanding ring e and binding device f may be thereafter applied to secure the unit to the felly h.

It isto be noted particularly. that the entire device, comprising the tire a, members b and k, and the ring a, ma be re moved as an assembledunit from t e wheel while the tire a is inflated without causthe ring c. The pressure of the air within the tire a tends to separate the members I) and 7c and thereby forces one side wall of each slot m against one side of each projection 65. Also the contractile tendency of the ring 0, causes one end of each projection (l to be forced against one end wall of each slot m. However, even though the projections (l are slightly wedge impossible for the members I) and k to ride upwardly upon the projections/Z by the action of the forces just described. This is true since'the square end of the latch t engages the square end of the ring 0 and thereby prevents collapse of the latterand maintains the diameter thereof constant. Thus, until the latch t is forcibly removed, it is impossible for the ring 0 to collapse.

5 Where it is an inner tube desired to repair or renew the following operations ento make the repair conveniently andv in a short time: The binding device f is operated to release the 00king ring as is customary in rim constructions. The locking ring anddemountable rim are slid axially off the fixed rim, the latch t is opened by any suitable tool, the locking ring being self-contracting as indicated in Fig. 4 enables the operator to completely withdraw said ring from any connection with-the demountable rim in a manner obvious from an insp cti n of Fi 4:. The tire is now held by the duuountab e rim alone which is made in two parts, the outer shoe of the tire can be pulled apart in the customary manner and the beads will carry ,the two halves of the demountable rim into position to allow the inner tube to be withdrawn. The inner tube can be repaired and replaced in the shoe 'or a new one placed therein. The two halves of the demountable rim are brought together into proper co-acting relation and positioned by means of the dowel pin '1'. The operations first described in assembling the diil'crent parts of the run on the folly now take place and the structure is assembled as indicated in Fig. 1.

Bymeans tions describedit is possible tojquickly remove a tire from a wheel, change an inner tube and replace the tire on the-gwheel without the loss-of time occasioned by prying the heading of the tire from thedemountable rim: It will be noted in the construction involved in this invention no necessity for removing the tire from rim ordinarily arises.

One of the essential vention described lies in the manner in which the demountable rim and locking ring are operated one with the other to enable a quick removal of the inner tube from the'shoe without prying the beading of the tire away from the sides ofthe dcmountable rim, an operation which is always a most tedious one in handling tires.

\Vhile applicant has described a particular form of his invention it can be varied within certain limits asdelincd in-thc annexed claims.

What I claim, is

1. A demountable tire-carrying rim composed of two annular members brought to-- gether in a plane perpcndicular'to the axis of the rim, each member being provided with a circumferential series of slots together with a self-contracting locking ring provided with projections to enterthe slots of both of said members, a latch in said ring which, when open, permits the ring to contract and, when closed, prevents such contraction whereby the projections can be held in position in the slots or removed therefrom as desired.

2. A dcmountable tire-carryin r rim, composed of two annular members gether in a plane perpendicular to the axis of the rim, each member being provided with a eircum ferential series of slots, together with a self-contracting locking ring provided with circumterentially thereon adapted .when said ring is expanded to enter said slots and bind said annular members together, and a latch on said locking ring to hold said ring in expanded position whereby the annular members-and looking ring are held in assembled condition and 1 may be placed on or removed from the wheel as a unit.

JOHN CLARENCE COLE. \Vimesses:

KrI. Ominous, FnANnmN G. NEAL.

of the construction and opera the demountable features of the inv rought todisposed-projections v 

